Special Marine Warning 62, NWS Philadelphia/Mount Holly

Issued

Jul 1, 2021, 5:40 PM EDT (21:40 UTC)

Expired

Jul 1, 2021, 6:45 PM EDT

In force

65 min

Issued by

NWS Philadelphia/Mount Holly

Area

Storm-based polygon

Hail

0.0 in

Wind

50.0 mph

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 21:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

983 
WHUS51 KPHI 012140
SMWPHI
ANZ431-451>455-473-475-012245-
/O.NEW.KPHI.MA.W.0062.210701T2140Z-210701T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
540 PM EDT Thu Jul 1 2021

The National Weather Service in Mount Holly NJ has issued a

* Special Marine Warning for...
  Lower Delaware Bay...
  Coastal waters from Manasquan Inlet NJ to Fenwick Island DE out 20
  nm...
  Outer waters from Great Egg Inlet NJ to Fenwick Island DE out 20 to
  40 nm...

* Until 645 PM EDT.

* At 539 PM EDT, severe thunderstorms capable of producing
  waterspouts were located along a line extending from 7 nm northwest
  of Sea Isle City to Fenwick Island, moving east at 30 knots.

  HAZARD...Waterspouts and wind gusts in excess of 50 knots.

  SOURCE...Radar.

  IMPACT...Waterspouts can easily overturn boats and create locally 
           hazardous seas. Boats could suffer significant structural 
           damage in high winds. Small craft could capsize in 
           suddenly higher waves.

* Locations impacted include...
  Atlantic City, Five Fathoms Buoy, Buoy 2fb, Fenwick Island, Buoy
  4fb, Buoy 3fb, Cape Henlopen, Great Egg Reef, Ocean City Reef,
  Indian River Inlet Bridge, Overfalls Shoal, The Lump, 28-
  Mile Wreck, Brigantine, Bethany Beach, Little Egg Reef, Atlantic
  City Reef, Great Egg Inlet, Rehoboth Beach and Cape May Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor immediately as gusty winds and high waves are
expected.

&&

LAT...LON 3845 7503 3845 7510 3851 7511 3852 7516
      3934 7500 3934 7493 3931 7491 3923 7495
      3921 7488 3915 7481 3924 7477 3931 7485
      3935 7478 3939 7478 3942 7466 3938 7466
      3938 7464 3945 7454 3957 7400 3827 7445
TIME...MOT...LOC 2139Z 251DEG 28KT 3925 7480 3848 7505 

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...50KTS

$$

CMS

504 
FZUS71 KPHI 012219
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
619 PM EDT Thu Jul 1 2021

ANZ431-012228-
/O.CAN.KPHI.MA.W.0062.000000T0000Z-210701T2245Z/
619 PM EDT Thu Jul 1 2021

...THE SPECIAL MARINE WARNING IS CANCELLED...

The affected areas were...
Lower Delaware Bay...

The thunderstorms have moved out of the warned area
and no longer pose a significant threat to boaters.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern New Jersey...and the adjacent coastal waters.

LAT...LON 3839 7483 3915 7463 3938 7464 3946 7451
      3957 7400 3827 7445
TIME...MOT...LOC 2218Z 244DEG 77KT 3944 7436 3921 7416 3884 7435 3848
7463

$$

ANZ451>455-473-475-012245-
/O.CON.KPHI.MA.W.0062.000000T0000Z-210701T2245Z/
619 PM EDT Thu Jul 1 2021

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 645 PM EDT...

For the following areas...
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm...
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm...
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm...
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20
nm...
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20
nm...
Waters from Cape May NJ to Fenwick Island DE out 20 to 40 nm...
Waters from Great Egg Inlet NJ to Cape May NJ out 20 to 40 nm...

At 618 PM EDT, severe thunderstorms capable of producing waterspouts
were located along a line extending from near Brigantine to 6 nm
southeast of Atlantic City Reef to 10 nm south of 28-
Mile Wreck to near Delaware Lightship Buoy 44009, moving northeast at
75 knots.

HAZARD...Waterspouts and wind gusts in excess of 50 knots.

SOURCE...Radar indicated.

IMPACT...Waterspouts can easily overturn boats and create locally 
         hazardous seas. Boats could suffer significant structural 
         damage in high winds. Small craft could capsize in suddenly 
         higher waves.

Locations impacted include...
Atlantic City, Five Fathoms Buoy, Buoy 2fb, Little Egg Reef, Atlantic
City Reef, Buoy 4fb, Great Egg Inlet, Great Egg Reef, Ocean City
Reef, 28-
Mile Wreck, Little Egg Inlet, Buoy Ge, Cape May Reef, Brigantine and
Delaware Lightship Buoy 44009.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor immediately as gusty winds and high waves are
expected.

&&

LAT...LON 3839 7483 3915 7463 3938 7464 3946 7451
      3957 7400 3827 7445
TIME...MOT...LOC 2218Z 244DEG 77KT 3944 7436 3921 7416 3884 7435 3848
7463

WATERSPOUT...POSSIBLE
HAIL...0.00IN
WIND...50KTS

$$

Robertson

Special Marine Warnings in New Jersey, 2021Every special marine warning in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.